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Dokumentenidentifikation EP1415907 01.06.2006
EP-Veröffentlichungsnummer 0001415907
Titel Kühlsystem für die Laderaum eines Containerschiffes
Anmelder Koja Oy, Tampere, FI
Erfinder Nousiainen, Esko, 33730 Tampere, FI;
Sorkio, Vesa, 36240 Kangasala, FI
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 60304796
Vertragsstaaten AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LI, LU, MC, NL, PT, SE, SI, SK, TR
Sprache des Dokument EN
EP-Anmeldetag 28.02.2003
EP-Aktenzeichen 033960154
EP-Offenlegungsdatum 06.05.2004
EP date of grant 26.04.2006
Veröffentlichungstag im Patentblatt 01.06.2006
IPC-Hauptklasse B63J 2/08(2006.01)A, F, I, 20051017, B, H, EP

Beschreibung[en]

This invention relates to a cooling system for the hold of a container ship.

The system is intended for cooling the cargo hold of container ships for carrying refrigerated food containers. Food containers are provided with an intra-container refrigeration system, having its condenser outside the container. The condenser generates heat in the cargo hold, and the resulting heat, as well as its ventilation, limit the number of containers carried in the hold.

One solution applied earlier and very extensively at present is to ventilate a cargo hold with atmospheric air by means of fans set on the deck above the cargo hold and channeled down into the cargo hold. In warm regions, this solution leads to very high-volume and uneconomical air flows.

This type of prior art solutions have drawbacks as follows.

In warm regions, the cooling effect obtained by atmospheric ventilation air is quite low as a result of a small temperature difference, i.e. ventilation of container-delivered heat from the hold is very difficult. Temperature in the hold must not rise to above +45°C, the exceeding of which results in a substantial deterioration of the refrigerating capacity of containers and in the spoilage of foodstuffs constituting the cargo. As a result of this, cargo holds have a low carrying capacity for refrigerated containers. The air volumes in vessels carrying refrigerated containers have been increased as much as permitted by deck facilities, which leads to expensive deck superstructures, and even to lengthened hull structures in a vessel.

From US patent 3,486,553 is known a cooling system for the hold of a container ship. This cooling system comprises a cooling mechanism, which is accomodated in its own separate space between the bulkhead and hull of the ship. Cooling system is operated by a refigeration compressor, which supplies the top of the hold with refigerated air. This refigerated air is circulated between the refigerated containers in order to maintain an appropriate ambient temperature.

With the cooling system of the above mentioned US patent the air volumes can be reduced somewhat, but there is still need for adequate air space between the containers in order to assure effective circulation of cooled air.

It is an object of the invention to eliminate such drawbacks. A cooling system of the invention is characterized in that the cooling system further comprises a fan for blowing refrigerated air along a duct system to the condensers of cooling containers, and a cooling radiator, through which the cooling water chilled by a refrigeration compressor is circulated by means of a cooling water pump.Various embodiments of the invention are set forth in the dependent claims in the appended set of claims.

The basic idea is to fit a shipping container inside the cargo hold with refrigeration equipment and fans, capable of blowing refrigerated air along air ducts to the condensers of refrigerated containers constituting a cargo. Cold air chills the condenser and maintains the cargo hold temperature at +45° max. The cargo hold is sealed in a watertight manner by cargo hatches on deck and, thus, constitutes a reasonably tight compartment. The air blown to condensers warms up in a condenser and returns back to the cooling container by way of a recirculation air opening to serve as recirculation air and is refrigerated further and blown back to condensers in the cargo hold.

Only a little air is replaced in the cargo hold by means of fans fitted with frequency changers.

The cooling container's automation can be used for managing cargo hold conditions from the bridge and the engine control room, and for monitoring temperatures of containers carried as a cargo.

Benefits gained by the inventive solution:

  • Carrying capacity for refrigerated containers in a cargo hold increases substantially.
  • ontrol over conditions in a cargo hold is improved, spoiling of a cargo is prevented by effective automated management of cargo hold conditions.
  • Moisture problems in a cargo hold are alleviated.
  • Quality of a shipment is maintained by virtue of controlled conditions.
  • Overall length of a ship is reduced, the room required by fans need no longer be considered in the utilization of cargo spaces.
  • Electric power consumed by a ship decreases.
  • Space of deck fans can be utilized for carrying deck cargo containers.

The invention will now be described by way of example with reference to the accompanying drawing, which shows diagrammatically a cooling system of the invention.

The cooling container is constituted by a standardized 20- or 40-foot long steel container. The container houses a refrigeration compressor 2, which is fitted sea water condensing pumps 7. A pipework 10 extends to a sea water tank. The refrigeration compressor is provided with a condenser 11 and an evaporator 12. Cooling water chilled by the refrigeration compressor is circulated by cooling water pumps 6 through cooling radiators 5.

The cool water refrigerates air circulating from a cargo space by way of a return air duct 8, said air being blown back to the condensers of cargo containers by means of fans 3 along an inlet duct system 4.

Inside the container 1 is fitted a cooling water pipe system 9, a sea water condensing pipe system and pipe system fittings. The container also houses all actuators or starters required by the pumps, the refrigeration compressor, and the fans.

Work stations for system control equipment are set up on the bridge and in the control room (ECR). The work stations and the containers are interconnected by way of a bus.

20-foot long containers used as cooling containers can be set on top of each other, such that the lowermost containers are provided with refrigeration equipment and the topmost containers are provided with fans and cooling radiators.

The cooling containers may also comprise 40-foot containers and 20-foot containers in various combinations, depending on the size of a cargo compartment.

Refrigeration equipment can also be taken out of the containers and placed outside the cargo compartment in a space provided in a separate system.


Anspruch[de]
Kühlsystem für den Laderaum eines Containerschiffs, bestehend aus einer Kühlvorrichtung, welche in einem eigenen, separaten Raum (1) angeordnet ist und einem Kühlkompressor (2) betrieben wird, und durch welche der Laderaum des Containerschiffs mit gekühlter Luft (4) versorgt wird, welche dazu geeignet ist eine angepasste Umgebungstemperatur rund um die Kühlkörper der gekühlten Container zu gewährleisten, welche eine Ladung ausbilden, dadurch gekennzeichnet, dass das Kühlsystemen ferner ein Gebläse (3) zum Einblasen gekühlter Luft in ein geführtes Rohrsystem (4) zu den Kühlkörpern der zu kühlenden Container aufweist, und einen Kühlradiator (5), durch welchen das Kühlwasser mittels einem Kühlkompressor (2) abkühlt und durch eine Kühlwasserpumpe (6) umgewälzt wird. Kühlsystem nach Anspruch 1, dadurch gekennzeichnet, dass das Kühlsystem (1) in einem Container angeordnet ist. Kühlsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Kühlsystem eine Automatik- und Steuereinheit aufweist, wobei die Betriebsbedingungen und Temperatur des Laderaums von der Brücke und vom Maschinenraum eines Schiffs aus gesteuert werden. Kühlsystem nach einem der vorangegangen Ansprüche, dadurch gekennzeichnet, dass der Kühlkompressor (2) mit einer Meerwasser-Kondensationspumpe (7) oder mit einem Luftkühlkörper ausgestattet ist.
Anspruch[en]
A cooling system for the hold of a container ship comprising a cooling mechanism, which is accommodated in its own separate space (1) and operated by a refrigeration compressor (2), and by which the hold of a container ship is supplied with refrigerated air (4) capable of maintaining an appropriate ambient temperature around the condensers of refrigerated containers constituting a cargo, characterized in that the cooling system further comprises a fan (3) for blowing refrigerated air along a duct system (4) to the condensers of cooling containers, and a cooling radiator (5), through which the cooling water chilled by a refrigeration compressor (2) is circulated by means of a cooling water pump (6). A cooling system as set forth in claim 1, characterized in that the cooling system (1) is accommodated in a container. A cooling system as set forth in claim 1 or 2, characterized in that the cooling system comprises an automation and control unit, whereby the conditions and temperature of a hold are controllable from the bridge and engine control room of a ship. A cooling system as set forth in any of the preceding claims, characterized in that the refrigeration compressor (2) is provided with a sea water condensing pump (7), or with air condensers.
Anspruch[fr]
Système de refroidissement pour la cale d'un navire porte-conteneurs, comprenant un mécanisme de refroidissement logé dans son propre espace séparé (1) et actionné par un compresseur de réfrigération (2), et à l'aide duquel la cale du navire porte-conteneurs est alimentée en air réfrigéré (4) permettant de maintenir une température ambiante appropriée autour des condenseurs de conteneurs réfrigérés constituant une cargaison, caractérisé en ce qu'il comprend également un ventilateur soufflant (3) destiné à envoyer de l'air réfrigéré le long d'un système de conduits (4) aux condenseurs des conteneurs réfrigérés, et un radiateur de refroidissement (5) à travers lequel de l'eau de refroidissement réfrigérée par le compresseur de réfrigération (2) est amenée à circuler au moyen d'une pompe à eau de refroidissement (6). Système de refroidissement tel que défini dans la revendication 1, caractérisé en ce qu'il est logé dans un conteneur. Système de refroidissement tel que défini dans la revendication 1 ou 2, caractérisé en ce qu'il comprend une unité d'automatisation et de commande, pour qu'ainsi les conditions et la température de la cale puissent être commandées depuis le pont et le poste de commande du navire. Système de refroidissement tel que défini dans l'une quelconque des revendications précédentes, caractérisé en ce que le compresseur de réfrigération (2) est équipé d'une pompe de condensation d'eau de mer (7) ou d'aérocondenseurs.






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

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